Triangle area!!

Geometry Level pending

Find the area of the above triangle ِ A B C ABC in terms of n , m , r , n,m, r, and s s .

I- ∣ n s − r m ∣ 2 \large {\frac{ | ns - rm| }{2} }

II- r m − n s 2 \large {\frac{ rm - ns }{2}}

III- n s − r m 2 \large {\frac{ns - rm}{2}}

I II,III III II

Ossama Ismail by Ossama Ismail , 63, Egypt

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1 solution

Ahmad Saad
Feb 1, 2017

2*|area| = Ax(By - Cy) + Bx(Cy - Ay) + Cx(Ay - Bt) = 0 + n(s-0) + r(0-m)

area = |ns - rm|/2

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